2011 Mercedes-Benz SL-Class luxury

The SL550 Roadster is provided with a standard 5.5-liter, V8, 382-strength motor that realizes 14-mpg in the burb and 22-mpg on the parkway. A 7-speed mechanical transmission with overdrive is standard. The SL65 AMG Roadster is provided with a standard 6.0-liter, V12, 604-strength, turbo motor that realizes 12-mpg in the burb and 18-mpg on the parkway. A 5-speed mechanical transmission with